23005566 has 32 divisors (see below), whose sum is σ = 53349120. Its totient is φ = 7334712.

The previous prime is 23005547. The next prime is 23005571. The reversal of 23005566 is 66550032.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8020 + ... + 10503.

It is an arithmetic number, because the mean of its divisors is an integer number (1667160).

Almost surely, 2^23005566 is an apocalyptic number.

23005566 is an abundant number, since it is smaller than the sum of its proper divisors (30343554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23005566 is a wasteful number, since it uses less digits than its factorization.

23005566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18557 (or 18551 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 23005566 is about 4796.4117838234. The cubic root of 23005566 is about 284.4096366618.

Adding to 23005566 its reverse (66550032), we get a palindrome (89555598).

The spelling of 23005566 in words is "twenty-three million, five thousand, five hundred sixty-six".